Sumitomo Chemical Company, Limited

Hidetake Hozumi

Hirofumi Johoji

Tadaaki Nishiyama

Atsuko Ogawa

Keisaku Yamamoto

Yoshihiro Nakatsuji

Hisakatsu Hama

Hiroyuki Sugimoto

Tatsuo Sassa

Akihiro Ichige

Hirofumi Jyouhouji

Yasuhito Ijichi

The object of the present invention is to provide a process for producing an ethylene-&#x3b1;-olefin-polyene copolymer by continuous multistage polymerization which can give an ethylene-&#x3b1;-olefin-polyene copolymer excellent in a form retention property during extrusion. The process for producing an ethylene-&#x3b1;-olefin-polyene copolymer comprises continuously polymerizing ethylene, &#x3b1;-olefin, and the following polyene (A) and polyene (B) in a solvent in the presence of an olefin polymerization catalyst using a polymerization reaction apparatus comprising two tanks of polymerization reactors connected in series, wherein the polymerization is carried out under specific conditions:

Process for producing ethylene-&#x3b1;-olefin-polyene copolymer

The present invention relates to an olefin derived copolymer and a thermoplastic resin composition using the olefin derived copolymer satisfying the following (1) and (2): (1) tensile strength at break measured based on JIS K6251 is 2.0 or less MPa; and (2) tensile elongation at break EB (%) of a resin composition obtained satisfies the following relational expression (expression 1) and (expression 2), when blended with a polypropylene derived resin that has 20 degree C. xylene soluble component of not more than 20 wt %.[3/5]&#x2212;[2/6]&#x2267;0.15&#x2003;&#x2003;(expression 1)[2/6]&#x2267;&#x2212;800&#x2003;&#x2003;(expression 2) (R[3/5] and R[2/6] are obtained by the following methods: a curve is obtained by plotting tensile elongation at break EB (%) (based on JIS K6251) of resin composition taken as vertical axis, and weight part rate Pa of a content of an olefin derived copolymer contained in a resin composition taken as horizontal axis; a multiple regression curve in section regions of Pa=0.30-0.50 and Pa=0.20-0.60 (Pa represents content weight percentage of an olefin derived copolymer contained in a resin composition) of a multiple regression expression obtained by quintic multiple regression of the curve is obtained; R[3/5] and R[2/6] are defined as multiple correlation coefficients of a primary straight line obtained by approximating of the multiple regression curve by method of least squares. S[2/6] represent a gradient of a primary straight line (expression) obtained by approximating the above-mentioned multiple regression curve by a method of least squares in section region of Pa=0.20-0.60. In addition, in the above-mentioned multiple regression expression, it is indispensable that data at least seven points Pa=0.00, 0.20, 0.30, 0.40, 0.50, 0.60 and 0.70 are contained. Furthermore, when data at points of number beyond above case are contained, it is indispensable that total Pa values exist at 0.10 or less of fixed interval mutually.

Olefin derived copolymer

Adhesive film

An olefin based copolymer composition having excellent weather resistance and excellent recycling properties having an olefin based copolymer obtained by copolymerizing two or more olefins, wherein the olefins are selected from the group consisting of ethylene, propylene and alpha olefins having 4 to 20 carbon atoms, and the total number of carbon atoms of the two or more selected olefins is 6 or more in combination with other component(s).

Olefin-based copolymer composition

Olefin polymer and thermoplastic resin composition

Thermoplastic resin composition

A propylene copolymer comprising propylene, at least one olefin selected from the group consisting of olefins having 2 to 20 carbon atoms except propylene, and a cyclic olefin, wherein the total number of carbon atoms of the monomers except the cyclic olefin is at least 7. This copolymer is mixed with a thermoplastic resin such as polypropylene to provide a thermoplastic resin composition having excellent flexibility, transparency, resistance to whitening on bending, scratch resistance and heat resistance.

Propylenic copolymer and thermoplastic resin composition

A pressure-sensitive adhesive comprising an olefin-based copolymer wherein (1) the olefin-based copolymer has a tensile strength at break measured according to JIS K 6251 of 2.0 MPa or less, and (2) the elongation at break EB(%) of a resin composition obtained in blending the olefin-based copolymer with a polypropylene-based resin having a 20&deg; C. xylene-soluble component content of 20 wt % or less satisfies the following formula 1: S&lsqb;2/6&rsqb;&gE;&minus;800, wherein S&lsqb;2/6&rsqb; represents the gradient of a primary straight line, and Pa represents the weight content proportion of the olefin-based copolymer contained in the resin composition.

Pressure sensitive adhesive

A thermoplastic elastomer composition comprising (a) 100 wt. parts of a polyolefin resin, (b) 5 to 250 wt. parts of an ethylene-&agr;-olefin copolymer rubber in which the content of the &agr;-olefin units is at least 50 wt. %, and (c) 0 to 500 wt. parts of an ethylene-&agr;-olefin copolymer rubber in which the content of the &agr;-olefin units is less than 50 wt. %. This composition can provide a molded article which is hardly whitened when it is bent, and has good flexiblity.

Thermoplastic elastomer composition and powder and molded article thereof

A propylene copolymer obtainable by polymerizing a propylene, at least one of .alpha.-olefin having 4-20 carbon atoms, and ethylene, in the presence of a catalyst for olefin polymerizaton including the following (A), (B) and/or (C):

Propylene copolymer

A propylene-1-butene copolymer wherein a Shore A-scale hardness measured according to ASTM D2240 is not more than 70 and an intrinsic viscosity [.eta.] measured in axylene solvent at the temperature of 70.degree. C. is not less than 0.3 and which shows no crystalline melting peak and no crystallization peak in differential scanning calorimeter (DSC) mesurement.

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Ichihara, Japan

Hidetake Hozumi